package cn.edu.scau.cmi.shishuai.exercise6;

class AA{
	final double PI = 3.1415926;
	public double getArea(final double r) {
		return PI * r * r;
	}
	public final void speak() {
		System.out.println("您好，How's everything here?");
	}
}

public class Example6_6 {

	public static void main(String[] args) {
		AA a = new AA();
		System.out.println("面积：" + a.getArea(100));
		a.speak();

	}

}
